Brushes should be washed at the sink and let to dry over the edge of any surface. Do not submerge ferrule or hairs may be loosened. Apply a small amount of Brush Bath into the palm of your hand or small dish. In a pool of warm water shallower than your brush's ferrule, swirl the brush head gently till you see a colorful lather. Rinse beneath a slow stream of warm water until the water runs clear.